Fix tests broken by quic client and remove #[ignore] annotations

[willhickey]

Problem

These tests are failing as a result of setting DEFAULT_TPU_USE_QUIC = true which enables quic client (see PR #26927).

• bench-tps/tests/bench_tps.rs

  • test_bench_tps_local_cluster_solana - Fixed in PR Fix test_bench_tps_local_cluster_solana #27448

• core/src/banking_stage.rs

  • test_forwarder_budget
  • test_handle_forwarding

• dos/src/main.rs

  • test_dos_with_blockhash_and_payer - Fixed in PR Fix test_bench_tps_local_cluster_solana #27448
  • test_dos_with_blockhash_and_payer_and_quic - Fixed in PR Fix test_bench_tps_local_cluster_solana #27448

Notes

Similar failures in other tests caused by port mismatches between client and server (PR #27046) and address mismatches (0.0.0.0 vs 127.0.0.1) ( PR #27071 and #27096)

cargo test --package solana-bench-tps --test bench_tps --all-features -- test_bench_tps_local_cluster_solana --exact --nocapture --include-ignored
Panics with TransportError(Custom("\"ConnectionError(TimedOut)\""))

cargo test --package solana-core --lib --all-features -- banking_stage::tests::test_forwarder_budget --exact --nocapture --include-ignored
Seems to hang. on unaffected branches this test takes a few seconds.

cargo test --package solana-core --lib --all-features -- banking_stage::tests::test_handle_forwarding --exact --nocapture --include-ignored
Seems to hang. on unaffected branches this test takes a few seconds.

cargo test --package solana-dos --bin solana-dos --all-features -- test::test_dos_with_blockhash_and_payer --exact --nocapture --include-ignored
Panics with TransportError(Custom("\"ConnectionError(TimedOut)\""))

cargo test --package solana-dos --bin solana-dos --all-features -- test::test_dos_with_blockhash_and_payer_and_quic --exact --nocapture --include-ignored
Panics with TransportError(Custom("\"ConnectionError(TimedOut)\""))